feat(bridge): MQTT bridge with Home Assistant auto-discovery

pkg/bridge/config.go

@@ -0,0 +1,42 @@
+package bridge
+
+import (
+	"errors"
+	"strings"
+)
+
+type Config struct {
+	Broker          string `yaml:"broker"`
+	Username        string `yaml:"username"`
+	Password        string `yaml:"password"`
+	ClientID        string `yaml:"client_id"`
+	BaseTopic       string `yaml:"base_topic"`
+	DiscoveryPrefix string `yaml:"discovery_prefix"`
+}
+
+func (c *Config) SetDefaults() {
+	if c.Broker == "" {
+		c.Broker = "tcp://localhost:1883"
+	}
+	if c.ClientID == "" {
+		c.ClientID = "ezcoo-usb-control"
+	}
+	if c.BaseTopic == "" {
+		c.BaseTopic = "ezcoo"
+	}
+	if c.DiscoveryPrefix == "" {
+		c.DiscoveryPrefix = "homeassistant"
+	}
+	c.BaseTopic = strings.TrimRight(c.BaseTopic, "/")
+	c.DiscoveryPrefix = strings.TrimRight(c.DiscoveryPrefix, "/")
+}
+
+func (c *Config) Validate() error {
+	if c.Broker == "" {
+		return errors.New("mqtt.broker is required")
+	}
+	if c.ClientID == "" {
+		return errors.New("mqtt.client_id is required")
+	}
+	return nil
+}